Fluke PQ400 Power Quality and Electrical Measurement Window


Key Features:

  • Reduced risk—Permanently installed voltage and current connections can be accessed without opening the panel door
  • Increased efficiency—Quickly connect your logger or analyzer and begin taking measurements faster than ever
  • Easy installation—A standard step drill bit and electro-hydraulic hole punch provide the simple means to quickly mount the window in the panel
  • Permanently connected voltage and current sensors located inside the electrical panel allow you to make power quality and energy measurements using the external access points without opening the panel door, reducing operator risk
  • Voltage and current connections for three-phase voltages, neutral and ground cover most measurement scenarios
  • Automatic probe detection for Fluke 1740 and 1730 series power quality and energy loggers and compatible clamps, eliminates the need to open cabinet to check the clamp model
  • Full 360 degree rotation allows the PQ400 window to be oriented in any direction
  • Simple installation using a step drill bit and electro-hydraulic hole punch (114.3 mm, 4.5 inch diameter)
  • CAT IV, 600V and CATIII 1,000V rating according to IEC61010-2-30
  • Compatibility with standard 4mm shrouded safety-socket voltage test leads makes it easier to make voltage connections, increases safety by reducing the risk of accidently touching live electrical components, and reduces the need for purchasing specialized voltage leads
  • Includes:PQ400 enclosure, 4 x male-male cable 2m for connection of Fluke-17xx iFlex current probes, Cable marker set 3P+N+PE, Cable ties, and Instruction sheet

Secured and trusted checkout with

The Fluke PQ400 Power Quality Window offers all the benefits of the Fluke PQ400/B Basic Power Quality Window, plus the addition of the PQ400 enclosure, 4 x male-male cable 2m for connection of Fluke-17xx iFlex current probes, Cable marker set 3P+N+PE and cable ties.

Number of inputs5 (A/L1, B/L2, C/L3, N, and earth/ground)
Wire gaugeSolid/flexible: 0.25 mm² to 1.5 mm² (AWG 24 to AWG 16)
VoltageMax. 1000 V
Fuse2 A 1000 V 1.5 A²s, 10 kA IR (A/L1, B/L2, C/L3, N)
Connectors5x 4 mm safety terminals, 3x red for A/L1, B/L2, C/L3, 1x black for N, 1x green for earth/ground
Load currentMax. 1 A rms
Connectors5x 4-pin circular compatible with Fluke 354x FC, 173x, and 174x power and power quality loggers (these loggers can all be power from the measured voltage up to 500V)v
General specifications
Maximum voltage between any voltage terminal and earth ground1000 V
Maximum voltage between any current terminal and earth ground30 V
GeneralIEC 61010-1: pollution degree 2
MeasurementIEC 61010-2-030: CAT IV 600 V / CAT III 1000 V
Outside148 mm x 187 mm x 23 mm (W x H x D) (148 mm x 370 mm x 19 mm with cover opened)
Inside140 mm x 158 mm x Di (W x H x D) Di = 58 – thickness of panel door in mm
Supported electrical enclosures
EnclosureUL 50/NEMA environmental type 1 (Type 12 when PQ400 cover is closed)
Panel thicknessMax. 3.5 mm (10 gauge)
Operating/storage temperature-25 °C to 60 °C (-13 °F to 140 °F)
Humidity10 % to 90 % in dependency of temperature according to IEC 60721-3-3 Class 3K6 (modified):-25 °C to 35 °C: 10 % to 90 %, 50°C: max. 35 %, 60°C: max. 23 %
Operating2,000 m (up to 4000 m derate to CAT II 1000 V, CAT III 600 V, CAT IV 300 V)
Storage12,000 m
Ingress protection
RatingIEC 60529: IP67 with cover closed, IP50 with cover opened and all connectors attached
VibrationIEC 60068-2-6 , MIL-PRF28800F: Random vibration class 2
Weight2.1 kg (4.6 lb)


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